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Frequently Bought Together

Frequently Bought Together

Product Overview

Pre-assembled glass block replacement window

Glass blocks are ideal for basements, showers, bathrooms and more

Increase privacy, security, efficiency and appearance

Clearly Secure individual glass blocks combine the qualities of beauty, performance and practicality in a material that permits the flow of light. Glass blocks are a special building material made of glass and laid similarly to brick or concrete blocks. Used in partitions, shower walls, curtain walls and room dividers, glass block permits light from one space to travel to another, helping to save on illumination costs. Glass block’s properties lend style and privacy while also helping to muffle sound. Additionally, individual glass block may be combined with other Clearly Secure glass blocks and Clearly Secure hopper and dryer vents to build enhanced privacy and security windows for basements, bathrooms, kitchens, garages, transoms, door sidelights, offices and much more.

10-Years from date of purchase limited warranty against manufacturing defects

Product Overview

Pre-assembled glass block replacement window

Glass blocks are ideal for basements, showers, bathrooms and more

Increase privacy, security, efficiency and appearance

Model #:4048SIC

Internet #:207175835

Clearly Secure individual glass blocks combine the qualities of beauty, performance and practicality in a material that permits the flow of light. Glass blocks are a special building material made of glass and laid similarly to brick or concrete blocks. Used in partitions, shower walls, curtain walls and room dividers, glass block permits light from one space to travel to another, helping to save on illumination costs. Glass block’s properties lend style and privacy while also helping to muffle sound. Additionally, individual glass block may be combined with other Clearly Secure glass blocks and Clearly Secure hopper and dryer vents to build enhanced privacy and security windows for basements, bathrooms, kitchens, garages, transoms, door sidelights, offices and much more.

Warranty / Certifications

Energy Star Qualified

Not Qualified

Manufacturer Warranty

10 year limited

Questions & Answers

Your instructions are for the installation of this glass block window unit into a brick walled ho...

Your instructions are for the installation of this glass block window unit into a brick walled house. Do you have instructions for installing this window unit into a house with vinyl siding (a brand new opening will be cut in the wall of the house).

Asked by: flyer403

just need some type of frame to install window into wall.

Answered by: Joe

Date published: 2018-10-09

Does this window have a channel to install vinyl siding on the outside?

Does this window have a channel to install vinyl siding on the outside?

Asked by: Bill

Glass Block windows with a vinyl frame and j channel would be under the CrystaLok brand.

Answered by: RGF Industries, Inc.

Date published: 2018-05-25

Can you install this one piece window with silicone instead of grout ? I am planning on replacin...

Can you install this one piece window with silicone instead of grout ? I am planning on replacing a bathroom window.

Asked by: DB

The window should be mortared into place, especially when located in a shower/wet area.

Answered by: RGF Industries, Inc.

Date published: 2017-07-24

Is this made in the USA?

Is this made in the USA?

Asked by: Brad

The windows are made/assembled in the USA with glass block produced in the Czech Republic.

Customer Reviews

Rated 5 out of
5 by
HomeDepotCustomer from
Loved this piece. So well priced and beautiful! ...Loved this piece. So well priced and beautiful! Met all my expectations. 5 stars!

Date published: 2019-01-15

Rated 5 out of
5 by
Roseann from
Easy installation came out better than I thought. I ordered...Easy installation came out better than I thought. I ordered by size and needed it taller since they were only 2 blocks wide. This was for a long skinny window. So I added another to stack on top. This worked fine but the first window had oblong blocks, the second square. No mention in the specs.??

Date published: 2019-01-08

Rated 5 out of
5 by
BK from
These windows fit perfectly! My contractor only charged me $150...These windows fit perfectly! My contractor only charged me $150 to install two of them. If you can find one that fits your space, then I highly recommend.

Date published: 2019-01-08

Rated 5 out of
5 by
cj from
Dimensioning was critical and these blocks fit within 1/16 ...Dimensioning was critical and these blocks fit within 1/16 of an inch. Arrived in perfect condition which was pretty amazing due to the weight involved. Exceeded out expectations for our application.

Rated 5 out of
5 by
BobbyJ from
Quality product. Once I built up window opening which was an odd size in a rock basement wall, t...Quality product. Once I built up window opening which was an odd size in a rock basement wall, the rest was easy. looks great and way more insulating than the previous single pane glass. I used Thinset mortar for final placement and finished with regular mortar. On the sides were the gap was bigger, I used Greatstuff for Windows expanding foam and then finished with mortar. looks great

Date published: 2018-11-27

Rated 5 out of
5 by
John from
Nice product. Seems to insulate from outside cold well. Very...Nice product. Seems to insulate from outside cold well. Very heavy.

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